🔄 Refactor: Improve number formatting function

Refactored the 'convertNumbThousand' function for better readability
and added a default value for the parameter.

src/utils/convertNumbThousand.ts

@@ -0,0 +1,7 @@
+const convertNumbThousand = (x?: number): string => {
+  if (!x) {
+    return "0";
+  }
+  return x.toLocaleString("en-US");
+};
+export default convertNumbThousand;